摘要
分析了银北地区历年6～9月光、温、水条件,通过田间试验复种青饲玉米,确定合适的播期,为银北灌区发展畜牧业提供青饲种植的技术依据,并提出了在该区发展青饲青贮玉米推广种植的策略方针。结果表明,成熟度5成以上所需积温≥2 260.0℃.d,气候保证率在80%,延长灌浆期5 d会使熟度提高1～2成。随着播期的推迟,其温度、降水的保证率明显下降。复种青饲玉米最适播期在7月10日前,适宜在6月下旬收获的蔬菜、粗杂粮田块复种,在水肥保证条件下成熟度可达4成以上,产草量和青贮营养能同时提高。早熟马铃薯、单种小麦在7月上旬之前收获后复种,成熟度难以保证,但产草量仍较高。麦套玉米不适宜复种麦带青饲玉米,热量明显不足,产草量、养分显著下降。
By analyzing the characters of sun duration, temperature and precipitation from June to September over past years in northern region of Ningxia, the suitable seeding date was determined based on the date of seed by a lot of experimentations of planting wheat and replanting silage corn, copes with the adjustment of agricultural industrialization. And a extend strategy of crop silage corn and the gist of developing stock raising technology were put forward for obtaining more economical effect in developing silage corn and stock raising in future in Northern Ningxia. The results showed that the accumulated temperature and climatic ensure rate for silage corn maturity proportion over 50% were 2 260.0 ℃ ·d and 80% respectively. The maturity proportion will increase 10%- 20% if filling period prolongs 5 days. If seeding date is delayed, temperature and precipitation insurances drop in evidence. The suitable seeding date was before 10, July, maturity proportion will under none water and nutrition limit, reach to 40% and increasing both yield and corn nutrition, if seeding date is June 30th ahead after vegetable or coarse food grain harvest. When seeding date was arranged after wheat harvest before July 10th, it was difficult to ensure that maturity degree was high, but yield remain high. It is unsuitable for planting silage corn on wheat-maize interplant field result in output reduction and nutrition decline because lack of thermal heat flux.
出处
《安徽农业科学》
CAS
北大核心
2009年第23期10934-10936,10972,共4页
Journal of Anhui Agricultural Sciences
基金
中国气象局新技术推广项目"宁夏枸杞气象与病虫害防控全程气象服务技术"(CMATG2007M44)
关键词
青饲玉米
气候分析
气候保证率
Silage corn
Climatic analysis
Climatic ensure rate
